Electric welding machine



FIG. 1 is a front view of an electric welding machine showing my new design;

FIG. 2 is a back view thereof;

FIG. 3 is a left view thereof;

FIG. 4 is a right view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a perspective view thereof.

The broken lines in the drawings depict unclaimed environmental subject matter. 

CLAIM The ornamental design for an electric welding machine, as shown and described. 